package dji.sampleV5.aircraft.util.wheel;

import android.content.Context;
import android.graphics.Color;
import android.graphics.Typeface;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;

import dji.sampleV5.aircraft.R;


/**
 * Abstract wheel adapter provides common functionality for adapters.
 */
public abstract class AbstractWheelTextAdapter extends AbstractWheelAdapter {

	/** Text view resource. Used as a default view for adapter. */
	public static final int TEXT_VIEW_ITEM_RESOURCE = -1;

	/** No resource constant. */
	protected static final int NO_RESOURCE = 0;

	/** Default text color */
	public static final int DEFAULT_TEXT_COLOR = 0xFF101010;

	/** Default text color */
	public static final int LABEL_COLOR = 0xFF700070;

	/** Default text size */
	public static final int DEFAULT_TEXT_SIZE = 24;

	// Text settings
	private int textColor = DEFAULT_TEXT_COLOR;
	private int textSize = DEFAULT_TEXT_SIZE;

	// Current context
	protected Context context;
	// Layout inflater
	protected LayoutInflater inflater;

	// Items resources
	protected int itemResourceId;
	protected int itemTextResourceId;

	// Empty items resources
	protected int emptyItemResourceId;

	int index = -1;

	protected boolean[] isSelected = null;

	/**
	 * Constructor
	 *
	 * @param context
	 *            the current context
	 */
	protected AbstractWheelTextAdapter(Context context) {
		this(context, TEXT_VIEW_ITEM_RESOURCE);
	}

	/**
	 * Constructor
	 *
	 * @param context
	 *            the current context
	 * @param itemResource
	 *            the resource ID for a layout file containing a TextView to use
	 *            when instantiating items views
	 */
	protected AbstractWheelTextAdapter(Context context, int itemResource) {
		this(context, itemResource, NO_RESOURCE);
	}

	/**
	 * Constructor
	 *
	 * @param context
	 *            the current context
	 * @param itemResource
	 *            the resource ID for a layout file containing a TextView to use
	 *            when instantiating items views
	 * @param itemTextResource
	 *            the resource ID for a text view in the item layout
	 */
	protected AbstractWheelTextAdapter(Context context, int itemResource,
			int itemTextResource) {
		this.context = context;
		itemResourceId = itemResource;
		itemTextResourceId = itemTextResource;

		inflater = (LayoutInflater) context
				.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
	}

	protected AbstractWheelTextAdapter(Context context, int itemResource,
			int itemTextResource, boolean[] isSelected) {
		this.context = context;
		itemResourceId = itemResource;
		itemTextResourceId = itemTextResource;
		this.isSelected = isSelected;

		inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
	}

	/**
	 * Gets text color
	 *
	 * @return the text color
	 */
	public int getTextColor() {
		return textColor;
	}

	/**
	 * Sets text color
	 *
	 * @param textColor
	 *            the text color to set
	 */
	public void setTextColor(int textColor) {
		this.textColor = textColor;
	}

	/**
	 * Gets text size
	 *
	 * @return the text size
	 */
	public int getTextSize() {
		return textSize;
	}

	/**
	 * Sets text size
	 *
	 * @param textSize
	 *            the text size to set
	 */
	public void setTextSize(int textSize) {
		this.textSize = textSize;
	}

	/**
	 * Gets resource Id for items views
	 *
	 * @return the item resource Id
	 */
	public int getItemResource() {
		return itemResourceId;
	}

	/**
	 * Sets resource Id for items views
	 *
	 * @param itemResourceId
	 *            the resource Id to set
	 */
	public void setItemResource(int itemResourceId) {
		this.itemResourceId = itemResourceId;
	}

	/**
	 * Gets resource Id for text view in item layout
	 *
	 * @return the item text resource Id
	 */
	public int getItemTextResource() {
		return itemTextResourceId;
	}

	/**
	 * Sets resource Id for text view in item layout
	 *
	 * @param itemTextResourceId
	 *            the item text resource Id to set
	 */
	public void setItemTextResource(int itemTextResourceId) {
		this.itemTextResourceId = itemTextResourceId;
	}

	/**
	 * Gets resource Id for empty items views
	 *
	 * @return the empty item resource Id
	 */
	public int getEmptyItemResource() {
		return emptyItemResourceId;
	}

	/**
	 * Sets resource Id for empty items views
	 *
	 * @param emptyItemResourceId
	 *            the empty item resource Id to set
	 */
	public void setEmptyItemResource(int emptyItemResourceId) {
		this.emptyItemResourceId = emptyItemResourceId;
	}

	/**
	 * Returns text for specified item
	 *
	 * @param index
	 *            the item index
	 * @return the text of specified items
	 */
	protected abstract CharSequence getItemText(int index);

	@Override
	public View getItem(int index, View convertView, ViewGroup parent) {
		if (index < 0 || index >= getItemsCount()) {
			return null;
		}

		if (convertView == null) {
			convertView = getView(itemResourceId, parent);
		}

		if (convertView == null) {
			return null;
		}

		TextView textView = getTextView(convertView, itemTextResourceId);
		if (textView == null) {
			return null;
		}

		//用于多选的时候 改变选中状态
		ImageView imageView = (ImageView) convertView.findViewById(R.id.flag);
		if (isSelected != null && index < isSelected.length) {
			if (isSelected[index]) {
				imageView.setVisibility(View.VISIBLE);
				textView.setTextColor(Color.RED);
			} else {
				imageView.setVisibility(View.INVISIBLE);
				textView.setTextColor(Color.BLACK);
			}
		}
		CharSequence text = getItemText(index);
		textView.setText(text != null ? text : "");

		if (itemResourceId == TEXT_VIEW_ITEM_RESOURCE) {
			configureTextView(textView);
		}

		return convertView;
	}

	@Override
    public View getEmptyItem(View convertView, ViewGroup parent) {
		if (convertView == null) {
			convertView = getView(emptyItemResourceId, parent);
		}
		if (emptyItemResourceId == TEXT_VIEW_ITEM_RESOURCE
				&& convertView instanceof TextView) {
			configureTextView((TextView) convertView);
		}

		return convertView;
	}

	/**
	 * Configures text view. Is called for the TEXT_VIEW_ITEM_RESOURCE views.
	 *
	 * @param view
	 *            the text view to be configured
	 */
	protected void configureTextView(TextView view) {
		view.setTextColor(textColor);
		view.setGravity(Gravity.CENTER);
		view.setTextSize(textSize);
		view.setLines(1);
		view.setTypeface(Typeface.SANS_SERIF, Typeface.BOLD);
	}

	/**
	 * Loads a text view from view
	 *
	 * @param view
	 *            the text view or layout containing it
	 * @param textResource
	 *            the text resource Id in layout
	 * @return the loaded text view
	 */
	private TextView getTextView(View view, int textResource) {
		TextView text = null;
		try {
			if (textResource == NO_RESOURCE && view instanceof TextView) {
				text = (TextView) view;
			} else if (textResource != NO_RESOURCE) {
				text = (TextView) view.findViewById(textResource);
			}
		} catch (ClassCastException e) {
			//LogUtils.e("AbstractWheelAdapter", "You must supply a resource ID for a TextView");
			throw new IllegalStateException("AbstractWheelAdapter requires the resource ID to be a TextView", e);
		}

		return text;
	}

	/**
	 * Loads view from resources
	 *
	 * @param resource
	 *            the resource Id
	 * @return the loaded view or null if resource is not set
	 */
	private View getView(int resource, ViewGroup parent) {
		switch (resource) {
		case NO_RESOURCE:
			return null;
		case TEXT_VIEW_ITEM_RESOURCE:
			return new TextView(context);
		default:
			return inflater.inflate(resource, parent, false);
		}
	}

	public void getChange(int index) {
		this.index = index;
		notifyDataChangedEvent();
	}

	public void setSelected(int index){
		// No selection support by default in base class;
	}

	public void setChange(int index) {
		setSelected(index);
		notifyDataChangedEvent();
	}

	public void notifyDataChanged() {
		notifyDataChangedEvent();
	}

}
